What is the circumference (x+7)^2+(y-2)^2=81 ?

The circumference (x+7)^2+(y-2)^2=81 is C=18pi

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circumference (x+7)^2+(y-2)^2=81

circumference

(x + 7)^{2} + (y - 2)^{2} = 81

C = 18 π

Solution steps

C = 2 π r

Find the radius

Radius given

(x + 7)^{2} + (y - 2)^{2} = 81 : r = 9

C = 2 π 9

Refine

C = 18 π

\frac{( x + 6 ) ^{2} + ( y - 7 ) ^{2}}{17} = 1

(x - 1)^{2} + (y - 3)^{2} = 25

(x - 4)^{2} + (y + 2)^{2} = 16

x^{2} + y^{2} + 8 x + 4 y - 3 = 40

x^{2} + y^{2} \leq 9

What is the circumference (x+7)^2+(y-2)^2=81 ?
The circumference (x+7)^2+(y-2)^2=81 is C=18pi